*** This bug is a security vulnerability ***

You have been subscribed to a public security bug:

Expected behavior: perform the "Basemark Web 3.0" benchmark (Firefox 87
and 88), at most a loss of performance.

Real behavior: the benchmark completely crashes the system in one of the
initial stages (4). The screen presents graphical distortion (it never
happens), intense crashes and sometimes it is solved with the automatic
suspension of the computer (which remains on at times). But it doesn't
usually come back from the crash.

The problem happens with the onboard ATI RADEON 3000 (RS780 driver) and
it happens in both xorg and wayland. Ubuntu and kernel duly updated to
the present date.

Crash moment: WebGL 1.0.2 Test (test 4/20); "Loading scene_uv2.DAE...."

Benchmark website: https://web.basemark.com/
Motherboard: GA78LMT
Ubuntu 20.04.2 LTS
Kernel 5.8.0-50-generic
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC2:  poe        1860 F.... pulseaudio
 /dev/snd/pcmC2D0p:   poe        1860 F...m pulseaudio
 /dev/snd/controlC0:  poe        1860 F.... pulseaudio
 /dev/snd/controlC1:  poe        1860 F.... pulseaudio
BootLog: Error: [Errno 13] Permissão recusada: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
DistUpgraded: 2021-03-25 15:17:02,784 DEBUG /openCache(), new cache size 67025
DistroCodename: focal
DistroRelease: Ubuntu 20.04
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] RS780L [Radeon 3000] [1002:9616] 
(prog-if 00 [VGA controller])
   Subsystem: Gigabyte Technology Co., Ltd RS780L [Radeon 3000] [1458:d000]
InstallationDate: Installed on 2021-03-04 (51 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 
(20210209.1)
MachineType: Gigabyte Technology Co., Ltd. GA-78LMT-USB3 6.0
Package: xorg-server (not installed)
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.8.0-50-generic 
root=/dev/mapper/vgubuntu-root ro quiet splash radeon.audio=1 vt.handoff=7
ProcVersionSignature: Ubuntu 5.8.0-50.56~20.04.1-generic 5.8.18
RelatedPackageVersions:
 linux-restricted-modules-5.8.0-50-generic N/A
 linux-backports-modules-5.8.0-50-generic  N/A
 linux-firmware                            1.187.11
Tags:  focal wayland-session wayland-session ubuntu
Uname: Linux 5.8.0-50-generic x86_64
UpgradeStatus: Upgraded to focal on 2021-03-25 (30 days ago)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare
_MarkForUpload: True
dmi.bios.date: 11/25/2014
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F2
dmi.board.name: GA-78LMT-USB3 6.0
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: SEx
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: 
dmi:bvnAwardSoftwareInternational,Inc.:bvrF2:bd11/25/2014:svnGigabyteTechnologyCo.,Ltd.:pnGA-78LMT-USB36.0:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-78LMT-USB36.0:rvrSEx:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-78LMT-USB3 6.0
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.102-1ubuntu1~20.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.2~20.04.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

** Affects: mesa (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: amd apport-collected ati basemark benchmark crash focal freeze 
graphics instability performance radeon rs780 ubuntu wayland-session
-- 
[radeon] Web benchmark freezing and crashing the system (Xorg crashes in Mesa's 
r600_dri.so)
https://bugs.launchpad.net/bugs/1926050
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